I just had a brainwave -
What if the effectiveness of your doctor is proportional to your overall salary?
i.e. a level 3 doctor is ok for team salary worth 100k or less
a level 4 doctor is ok for team salary worth 400k or less..etc etc
I have a level 5 doctor, and have no suffered an injury all season (and pretty much all of last season for that matter)
and then I buy in a rental or two, all of a sudden my guys are dropping like flies, and i am holding my breath during every game praying for no injuries
Maybe it's because by buying a rental, my team salary has gone over the threshold of my level 5 doctor?
Maybe age also has something to do with it, given that my rentals are grandpas (although it was abimbola 28 and maclean 25 that got injured)
Oh well, off to find a level 7 doctor!